Table 1.

Within colony variation and genetic structure of moss populations in the Antarctic (variation, multiple haplotypes detected within single moss clump; yes, genetic differentiation detected between populations at the geographical distance indicated. Data from, Seppelt et al. (1996 (1999)), Adam et al. 1997, Selkirk et al. 1997, 1998, Dale et al. 1999, Skotnicki et al. 1997, 1998a,b, 1999, 2000, 2001, 2002, 2004).

geographical scale of separation	within clumps	less than 1 km	10–100 km	100–1000 km	1000 km +	intercontinental
Bryum argenteum	variation	yes	yes	yes	?	?
Hennediella heimii	moderate variation	no	yes	yes	?	?
Campylopus pyriformis	variation	no	?	?	?	yes
Sarconeurum glaciale	?	no	no	no	yes	?
Ceratodon purpureus	variation	yes	yes	yes	yes	yes
Bryum pseudotriquetum	variation	?	yes	yes	?	?
Pohlia nutans	low–moderate variation	no	?	?	yes	?